Moving from WhatsApp to Signal is an important action, right now. WhatsApp’s parent company, Meta, has been involved in several cases of election interference: America in 2016, Trinidad and Tobago …
FYI, while Threema front-end clients (apps) are open-source (and offer reproducible builds, which is surprisingly uncommon in open-source land), the server component, though supposedly audited, remains closed-source.
EDIT: for comparison, the Signal server code is mostly open source, but things like the spam filter are closed.
Wrong.
https://threema.com/en/why-threema/open-source
FYI, while Threema front-end clients (apps) are open-source (and offer reproducible builds, which is surprisingly uncommon in open-source land), the server component, though supposedly audited, remains closed-source.
EDIT: for comparison, the Signal server code is mostly open source, but things like the spam filter are closed.